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46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
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* Boot time memory initialisation and memory allocator interface.
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*
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* Copyright (C) 2007 Bahadir Balban
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*
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*/
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#ifndef __GENERIC_PHYSMEM_H__
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#define __GENERIC_PHYSMEM_H__
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#include <l4/lib/list.h>
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#include INC_PLAT(offsets.h)
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#include INC_GLUE(memory.h)
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#define PHYSMEM_TOTAL_PAGES ((PHYS_MEM_END - PHYS_MEM_START) >> PAGE_BITS)
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/* A compact memory descriptor to determine used/unused pages in the system */
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struct page_bitmap {
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unsigned long pfn_start;
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unsigned long pfn_end;
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unsigned int map[PHYSMEM_TOTAL_PAGES >> 5];
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};
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/* Describes a portion of physical memory. */
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struct memdesc {
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unsigned int start;
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unsigned int end;
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unsigned int free_cur;
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unsigned int free_end;
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unsigned int numpages;
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};
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#if defined(__KERNEL__)
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/* Describes bitmap of used/unused state for all physical pages */
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extern struct page_bitmap page_map;
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extern struct memdesc physmem;
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#endif
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/* Sets the global page map as used/unused. Aligns input when needed. */
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int set_page_map(unsigned long start, int numpages, int val);
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/* Memory allocator interface */
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void physmem_init(void);
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void memory_init(void);
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#endif /* __GENERIC_PHYSMEM_H__ */
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